Feature: `end_with` matcher

  Use the `end_with` matcher to specify that a string or array ends with the expected
  characters or elements.

  ```ruby
  expect("this string").to end_with "string"
  expect("this string").not_to end_with "stringy"
  expect([0, 1, 2]).to end_with 1, 2
  ```

  Scenario: String usage
    Given a file named "example_spec.rb" with:
      """ruby
      RSpec.describe "this string" do
        it { is_expected.to end_with "string" }
        it { is_expected.not_to end_with "stringy" }

        # deliberate failures
        it { is_expected.not_to end_with "string" }
        it { is_expected.to end_with "stringy" }
      end
      """
    When I run `rspec example_spec.rb`
    Then the output should contain all of these:
      | 4 examples, 2 failures                          |
      | expected "this string" not to end with "string" |
      | expected "this string" to end with "stringy"    |

  Scenario: Array usage
    Given a file named "example_spec.rb" with:
      """ruby
      RSpec.describe [0, 1, 2, 3, 4] do
        it { is_expected.to end_with 4 }
        it { is_expected.to end_with 3, 4 }
        it { is_expected.not_to end_with 3 }
        it { is_expected.not_to end_with 0, 1, 2, 3, 4, 5 }

        # deliberate failures
        it { is_expected.not_to end_with 4 }
        it { is_expected.to end_with 3 }
      end
      """
    When I run `rspec example_spec.rb`
    Then the output should contain all of these:
      | 6 examples, 2 failures                     |
      | expected [0, 1, 2, 3, 4] not to end with 4 |
      | expected [0, 1, 2, 3, 4] to end with 3     |
